@SGaist said in How do I freeze the first row in a QTableWidget?: use the answer arrows rather than the quick answer box. Thanks, I discovered that after the first time I used it... :)

@suslucoder said in How to add datas in table widget with increasing the row number: It should start to add from row 0 to the end of row count And what is the problem? Set row count via https://doc.qt.io/qt-5/qtablewidget.html#setRowCount and add your data...